Вопрос № 1072226 - Английский язык

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Sheet metal forming is widely used when parts of certain shape and size are needed. 1_______. One characteristic of sheet metal forming is that the thickness of the sheet changes little in processing. The metal is stretched just beyond its yield point (2 to 4 percent strain) in order to retain the new shape. 2_______. Shearing is a cutting operation similar to that used for cloth.
3_______. For example, to make the roof of an automobile from a flat sheet, the edges are gripped and the piece pulled in tension over a lower die. 4_______. And finally the edges are sheared off to give the final dimensions.

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The main functions of windows are light and ventilation. 1_______. In those faraway days windows were frequently produced in shops. 2_______. What are the necessary components of a window? 3_______. The area of glass in windows of different types is determined according to the regulations. 4_______.

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Radioactive substances are composed of unstable atoms that break down and release high-level energy called radiation. These atoms eventually form new elements. There are three types of radiation, known as alpha rays, beta rays, and gamma rays. Alpha rays consist of four atomic particles: two protons and two neutrons. They are the weakest type of radiation and have a positive electrical charge. Beta rays are more powerful and are composed of atomic particles called electrons, which have a negative charge. Gamma rays are the most powerful and a pure form of energy with no mass and no charge.
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Alpha rays consist of …

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The French chemist Antoine Lavoisier is regarded as the father of modern chemistry. He is remembered particularly for his work on gases, gunpowder, and combustion. He discovered and named both oxygen and hydrogen, observing that these two gases combine to produce water. This led him to describe elements and compounds, giving many the names by which they are known today. Lavoisier and his wife Marie were meticulous scientists who produced some important manuals describing scientific experiments. In the aftermatch of the French Revolution, Lavoisier was executed by revolutionaries.
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The French chemist Antoine Lavoisier discovered and named …

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The American inventor Thomas Edison lived and worked in the United States all his life. He was the most productive inventor ever. During his lifetime, he patented 1,093 different inventions, including the incandescent electric lamp, the motion-picture projector, and the phonograph. He also set up the first industrial research laboratory. Edison had a slow start in life. He was expelled from school because people did not realize that he was deaf, thinking instead that he was unable to learn. His mother taught him at home, where he had built his own laboratory by the time he was 10 years old.
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Thomas Edison was expelled from school because people did not realize that he was …

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Any measurements – for example, of temperature, distance, time or weight – are based on units. A unit is a fixed quantity. In ancient times, body parts were used to measure length. The Greeks used the finger as a basic unit of length, with 16 fingers equaling one foot. Measurement of weight was originally based on how much a man could lift. These imprecise measurements developed into a system of common units.
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In ancient times, body parts were used to measure …